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    America's Heartland
            1316
                
                    
                        
                            Season 13
                        
                    
                    
                        
                            Episode 16
                        
                    
                
            
            
            Visit a working dog training school in Nebraska where dogs learn how to handle sheep and cattle roundups. A Texas program takes feral cats and provides them to farmers and ranchers to help battle rodent problems. U.S. Customs agents use specially trained dogs to discover unwelcome pests coming in from shipments overseas. Barn owls help to keep down pest populations in California vineyards.